Somehow, we don't satishfy with Apache SOLR search results in Drupal or independent usage with another engine. That's probably because we don't maximize stop words feature usage in Apache Solr. Stop words meaning words that will be ignore by search engine when proceesing queries. By default, there are no option in Drupal, especially in Apache Solr administration to add this stopwords collection. The only way is add it on our server directly, on apache solr configuration files.